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It runs Rscript on the specified host(s) to set up a worker process which listens on a socket for expressions to evaluate, and returns the results (as serialized objects)."><meta property="og:description" content="Uses packages parallel and snow. parallel::makePSOCKcluster is an enhanced version of snow::makeSOCKcluster in package snow.
It runs Rscript on the specified host(s) to set up a worker process which listens on a socket for expressions to evaluate, and returns the results (as serialized objects)."><meta property="og:image" content="https://usepa.github.io/EJAM/logo.svg"></head><body>
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      <img src="../logo.svg" class="logo" alt=""><h1>DRAFT / WAS WORK IN PROGRESS - find nearby blocks using Quad Tree data structure for speed, CLUSTERED FOR PARALLEL PROCESSING</h1>
      <small class="dont-index">Source: <a href="https://github.com/USEPA/EJAM/blob/HEAD/R/getblocksnearbyviaQuadTree_Clustered-DRAFT.R" class="external-link"><code>R/getblocksnearbyviaQuadTree_Clustered-DRAFT.R</code></a></small>
      <div class="d-none name"><code>getblocksnearbyviaQuadTree_Clustered.Rd</code></div>
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    <div class="ref-description section level2">
    <p>Uses packages parallel and snow. <a href="https://rdrr.io/r/parallel/makeCluster.html" class="external-link">parallel::makePSOCKcluster</a> is an enhanced version of snow::makeSOCKcluster in package snow.
It runs Rscript on the specified host(s) to set up a worker process which listens on a socket for expressions to evaluate, and returns the results (as serialized objects).</p>
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    <div class="section level2">
    <h2 id="ref-usage">Usage<a class="anchor" aria-label="anchor" href="#ref-usage"></a></h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><span><span class="fu">getblocksnearbyviaQuadTree_Clustered</span><span class="op">(</span></span>
<span>  <span class="va">sitepoints</span>,</span>
<span>  <span class="va">radius</span>,</span>
<span>  <span class="va">maxradius</span>,</span>
<span>  <span class="va">avoidorphans</span>,</span>
<span>  CountCPU <span class="op">=</span> <span class="fl">1</span>,</span>
<span>  <span class="va">quadtree</span></span>
<span><span class="op">)</span></span></code></pre></div>
    </div>

    <div class="section level2">
    <h2 id="arguments">Arguments<a class="anchor" aria-label="anchor" href="#arguments"></a></h2>


<dl><dt id="arg-sitepoints">sitepoints<a class="anchor" aria-label="anchor" href="#arg-sitepoints"></a></dt>
<dd><p>data.table with columns LAT, LONG</p></dd>


<dt id="arg-radius">radius<a class="anchor" aria-label="anchor" href="#arg-radius"></a></dt>
<dd><p>in miles</p></dd>


<dt id="arg-maxradius">maxradius<a class="anchor" aria-label="anchor" href="#arg-maxradius"></a></dt>
<dd><p>miles distance</p></dd>


<dt id="arg-avoidorphans">avoidorphans<a class="anchor" aria-label="anchor" href="#arg-avoidorphans"></a></dt>
<dd><p>logical</p></dd>


<dt id="arg-countcpu">CountCPU<a class="anchor" aria-label="anchor" href="#arg-countcpu"></a></dt>
<dd><p>for parallel processing via makeCluster() and <code><a href="https://rdrr.io/pkg/doSNOW/man/registerDoSNOW.html" class="external-link">doSNOW::registerDoSNOW()</a></code></p></dd>


<dt id="arg-quadtree">quadtree<a class="anchor" aria-label="anchor" href="#arg-quadtree"></a></dt>
<dd><p>index of all US blocks like localtree</p></dd>

</dl></div>
    <div class="section level2">
    <h2 id="details">Details<a class="anchor" aria-label="anchor" href="#details"></a></h2>
    <p>For all examples, see <code><a href="getblocksnearbyviaQuadTree.html">getblocksnearbyviaQuadTree()</a></code></p>
<p>Uses indexgridsize and quaddata  variables that come from global environment (but should pass to this function rather than assume in global env?)</p>
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    <div class="section level2">
    <h2 id="see-also">See also<a class="anchor" aria-label="anchor" href="#see-also"></a></h2>
    <div class="dont-index"><p><code><a href="getblocksnearby.html">getblocksnearby()</a></code> <code><a href="getblocksnearbyviaQuadTree.html">getblocksnearbyviaQuadTree()</a></code></p></div>
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